#51AC1F#51AC1F

#51AC1F is a light, vivid yellow-green. Relative luminance 0.314; OKLCH L 66.3% C 0.190 H 137.5°. Best body text is #000000 at 7.27:1 contrast (WCAG AA passes).

Color values

HEX	#51AC1F
RGB	rgb(81, 172, 31)
HSL	hsl(99, 69%, 40%)
HSV	hsv(99, 82%, 67%)
CMYK	cmyk(52.9%, 0%, 82%, 32.5%)
CIE-LAB	lab(62.80, -50.47, 58.19)
CIE-LCH	lch(62.80, 77.03, 130.93°)
OKLab	oklab(66.27% -0.14 0.1284)
OKLCH	oklch(66.27% 0.19 137.5)
XYZ	xyz(18.3926, 31.3519, 6.3784)
Luminance	0.3135 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AC1F #7A1FAC

analogous

#98AC1F #51AC1F #1FAC33

triadic

#51AC1F #1F51AC #AC1F51

tetradic

#51AC1F #1F98AC #7A1FAC #AC331F

square

#51AC1F #1F98AC #7A1FAC #AC331F

split-complementary

#51AC1F #331FAC #AC1F98

monochromatic

#20440C #397816 #51AC1F #6BD92F #90E363

Accessibility & contrast

On white

2.89

#51AC1F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.27

#51AC1F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AC1F

7.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AC1F	#FFFFFF	#000000	##000000
##51AC1F	1.00	2.89	7.27	7.27
#FFFFFF	2.89	1.00	21.00	21.00
#000000	7.27	21.00	1.00	1.00
##000000	7.27	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B29D00

Deuteranopia (green-blind)

#A69530

Tritanopia (blue-blind)

#4AA693

Achromatopsia (no color)

#989898

Design tokens & code

CSS

--color: #51ac1f;
/* rgb */ color: rgb(81, 172, 31);
/* oklch */ color: oklch(66.3% 0.190 137.5);

Tailwind

colors: {
  custom: {
    50: '#8bc568',
    500: '#51ac1f',
    950: '#000000',
  },
}

SCSS

$custom: #51ac1f;
$custom-light: #8bc568;
$custom-dark: #000000;

JSON

{
  "hex": "#51ac1f",
  "rgb": {
    "r": 81,
    "g": 172,
    "b": 31
  },
  "hsl": {
    "h": 98.723,
    "s": 69.458,
    "l": 39.804
  },
  "oklch": {
    "l": 0.66265,
    "c": 0.19001,
    "h": 137.5
  },
  "luminance": 0.31353
}

Semantic roles & 50–950 ramp

primary

#51AC1F

secondary

#A35FC8

accent

#3CECAE

background

#F9FCF6

surface

#F1F8EB

border

#CBD1C6

text

#0D1307

muted

#7E827A

Preview Lab

Preview with #51AC1F

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →